Cita APA (7th ed.)

Ayres, C. E. (1944). The theory of economic progress. University of North Carolina Press.

Cita Chicago (17th ed.)

Ayres, Clarence Edwin. The Theory of Economic Progress. Chapel Hill, North Carolina: University of North Carolina Press, 1944.

Cita MLA (9th ed.)

Ayres, Clarence Edwin. The Theory of Economic Progress. University of North Carolina Press, 1944.